Automatic weighing-scale.



A. M. WILLIAMS.

AUTOMATIC WEIGHING SCALE.

APPLICATION FILED Arima, 1914.

Patented Jan. 26, 1915.

3 SHEETS-SHEET 1,

INVENTOR AMl'l/zlzarms 3% WM AI ORNEYS WIINESSES THE MORRIS PETERS C0.,PHOTO-LITHO.l wAsHINGroN. D. c.

A. M. WILLIAMS.

AUTOMATIC WEIGHING SCALE.

APPLICATION FILED APE. 1s, 1914.

Patented Jn. 26, 1915.

SHEET 2,

3 SHEETS- iNVENTOR A. Mllz'ams WITNESSES'.

THE NORRIS PETERS Co.. PHOTO-LITHa. WASHINGTON, D C4 A. M. WILLAMS.AUTOMATIC WBIGHING SCALE. APPLICATION FILED APRJS, 1914.

'1, 26,1 64, I A Patented .1311.26, 1915.

3 SHEE S-SHEBT 3A INVENTOR alu/ ATTORNEYS 1HE NORRIS PETERS CO.,PHOTO-Uran.. WASHING TON. D. C.

ANDREW M. WILLIAMS, OF DALLAS, TEXAS.

AUTOMATIC WEIGHING-SCALE.

maaier.

Specification of Letters Patent.

Patented Jan. 2G, 191i.

Application filed April 13, 1914. Serial No. 831,430.

To aZZ fIJ/710m t may concern Be it known that ANDREW M. VTLLIAMS, acitizen ot' the United States, residing at Dallas, in the county ofDallas and State of Texas, have invented certain new and usefulImprovements in Automatic `Weigh ing-Scales, of which the following is aspecitic-ation.

My invention relates to new and useful improvements in that class ofautomatic weighing scales, which continuously receive a supply of bull;material such as grain, cotton seed, etc., and discharge the same inquantities having a predetermined weight.

My improvement may further be classified as being adapted to that classof automatic scales -which employ a main receiver into which material isnormally fed, and an auxiliary receiver into which the material is fedwhile the main receiver is discharging.

lt is the object of my invention to provide a 4continuous weighingautomatic scale that will operate with greater accuracy than such scalesas have been hitherto provided 'for a similar purpose, and which willLfurthermore employ a novel and positive mechanism for automaticallycontrolling` the doors of the main and auxiliary receivers.

. A still further object of the invention is to provide a device of thecharacter described that will be strong, durable, eiiicient and simpleand comparatively inexpensive to produce, also one in which the severalparts will not be lilrely to get out of working order. y

lith the above and other objects in view, the invention has relation tocertain novel features of construction and operation, an example ofwhich is described in the following specification and illustrated in theaccompanying drawings, wherein:

Figure l is a view of my weighing scales in side elevation, thepositions of the various parts when the main receiver is being iiiledbeing indicated in full lines, and the positions ot the parts when thesaid receiver is discharging being indicated in dash lines. Fig. 2 is aview of the same in front elevation. Fig. 3 is a horizontal sectionalview, the section being taken upon the line rc-.r of Fig. 1. Fig. 4 is afragmentary vertical sectional view showing the upper portion of thedevice, the section being taken upon. the line Q/-g/ of Fig. Q. Fig. 5is ay View duplicating certain parts illustrated in Fig. l, with theexception that" a certain ratchet wheel correlated with said parts isshown in dash lines in this figure, so as to permit certain parts behindsaid ratchet wheel to be seen. Fig. 6 is a detail sectional View, thesection being taken upon the line ,-5 of Fig. 1. Fig. 7 is a detailvertical sectional view, the section being taken upon the line eo-w ofFig. l.

Referring now more particularly to the drawings, wherein like referencecharacters designate similar parts in all the figures, the numeral ldenotes the four legs ot' the lower or supporting frame of mv scale, thefront legs of said frame being rigidly connected at their upperextremities by a horizontal beam 2, and a similar beam being extendedbetween the upper ends of the rear legs. The members 2 support theJfront and back edges ot a rectangular metallic frame 3, said tramebeing formed with feet 4, which are bolted or otherwise secured to themembers 2. rl`he parts l, 2 and 3 in conjunction constitute the lower orsupporting frame of my scale. lVithin said frame, there is mounted themain receiver 5. which terminates at its lower end some distance abovethe corresponding extremities of the legs 1, and has its upper enddisposed within the metallic 'trame 8. Adjacent to the top of saidreceiver, a pair oic knife edge pivot pins 6 project rigidly fromopposite points upon the receiver side walls. the location of saidpivots being such that the receiver will be balanced when supported bvthe same. The pivot pins 6 respectively enter suitable aperturesprovided in the forward extremities of two parallel bars 7, one of whichis disposed at each side of the receiver. lThe bars 7 are respectivelypivotally supported b y the parallel side members of the frame 3 asindicated at 8. the pivots 8 being considerably closer to the rear endsof the bars 7 than to the 'front ends ol" said bars. A rigid connectionis established between the rear extremities ot' the bars 7 by anelongated weight bar 9, adjacent to the top of the receiver at the rearof the same. Slightly to the rear ot the pivot 8 of one of the bars 7, avertical swinging link 10 has connection withsaid bar '7 and extendsdownwardly therefrom, the lower end of the link 10 being connected withthe rear portion of a normally horizontal scale beam 1l. The beam 11 ispassed at its rear end through a slot l1a in the rear member of' theframe 3 and is pivotally mounted upon a bracket 12 eXteriorly secured tothe frame 3. From theA Jforward end of the scale beam 11 there is swunga A weight pan 13 carrying a variable number of standard weights 14. Thebeam 11 is; graduated 1n the usual manner and carries the usual slidingpea 15,` which may be,

termined weight of material indicated upon the scale beam at the pointJto which the pea` 15 is adjusted.v

lThe bottom ot' the receiver 5 is formed byl a hinged door 17 mountedupon a pintle 18 extended along the rear edge ofthe door aperture. Aweighted arm 19-is; rigidly secured to the door and projects rearwardlyfrom the same, serving to automatically re.- turn the door to its normalclosed position after the contents of the receiver have been discharged.

At each side of the receiver, there is rigidly secured to the rear endof the door an arm 20 which in the closed position of the door projectsupwardly. rl`he free end of each arm 2O has pivotal connectionl with oneextremity of a swinging link 21, the other extremity of which haspivotal connection as indicated at 22 with one end of a second swinginglink 23, pivoted at its other end upon the adjacent side wall of thereceiver near the front edge of said wall. When the door 17 is in itsclosed position, the links 21 and 23, at each side of the receiver arein a horizontal alinement by which the door is locked in the positionspecified. The connected extremities of said links are contiguous abovethe pivot point 22. Gwing to this fact, and also to the provision of afinger 24 upon the link 23 which linger overhangs the link 21 andreceives a screw 25 bearing upon said link 2l, the alinement of the twolinks 21 and 23 may not be broken through a downward displacef ment oftheir oined extremities. Since the pivot point 22 is disposed at aslightly lower level than the pivot connecting with the otherextremities of said links, there is normally no chance for the alinementof the links to be broken by an upward displacement of their jointedextremities.

In order that the door 17 may be auto.- matically opened when thecontents of the receiver have reached the predetermined amount, avertical bar .26, is rigidly Secured at its upper end to the frame 3,and its lower extremity is bent at a right angle to support a spring 27beneath the juncture of the links 21 and 23, and to further support anadjusting screw 28, through which a horizontal portion of said springmay be varied slightly to or from the joined ends of the twolinks.lllilhen the material in the main receiver has accumulated to such anextent as to displace said receiver downwardly, the joinedends of thelinks 21 and 23 will come into contact with the spring 27 just above thescrew 28, the links consequently being displacedupwardly'out ofalinement. Owing to the heavy thrust acting forwardly in said links (dueto the weight of the material in the receiver), the angle of divergencebetween the links will at once increase, permitting the door to swing tothe open posi tion indicated in dash lines in Fig. 1, the resultingpositions of the arm 20 and the two swinging links being also shown indash linesin the same figure.

Upon the lower or supporting frame, there is superimposed an upperJiframe comprising a pair of uprights 29 respectively disposed at therear corners of my scale, and each carrying two forwardly projectingarms 30 and 31, the arms 30 having connection with the upper ends of theupriGhts, while the arms 31 are intermediately secured to the uprights.Between the arms 31, there is rigidly secured the upper extremity of anauxiliary receiver 32 considerablv smaller in size than the mainreceiver. rl`he auxiliaryv receiver is spaced slightly above the mainreceiver, and is provided with a doorv 33 forming its bottom, and hingedat its rear edge upon a pintle 34. A weighted arm 35 counterbalances thedoor 33, returning said door to its closed position after the auxiliaryreceiver has discharged its contents. lVith the door 38, there iscorrelated a locking mechanism similar to that already described asbeing associated with the door 17. rIhis mechanism comprises a pair ofarms 36 projecting rigidly from the rear portion of the door at eachside of the receiver, and a pair of swinging links 37 and 38 havingpivotally connected adjacent ends and having their other extremitiesrespectively pivotally connected to the correlated arm 36 and theforward portion of the adjacent side wall ot the receiver. Upon saidside wall, there is pivoted a bell-crank comprising a short arm 42projecting rearwardly and terminating beneath the joined ends of thelinks 37 and 38, and a long arm 43 projecting downwardly at a slightrearward inclination, and provided upon its lower end with a laterallyprojecting lug 44, which normally bears against the upper end of theadjacent arm 20. The short arm of the bell-crank carries a leaf spring47, which ,normally lies inst beneath the riveted @rds ylo of the linltslva'nd 38, 'and a screw mounted in sai'd 'arm 42 bears upwardlyagainstrsaid spring constituting a support for its free end.

When the 'door of the main receiver4 has been opened due to a downwarddisplacement of said receiver, the correlated parts 20, 2l 'and 23 willassume the positions indicated i'n dash lines in F ig. l, andvconsequently the bell-crank comprising the arms i2 and 43 will bepermitted to undergo a slight angular displacement such as will shiftthe long arm 48 slightly forward into Contact with a stop bracket 47Lmounted fast upon the adjacent lside wall of the main receiver. As thedoor of the main receiver returnsl to its closed position due to thecounterbalancing effect of the weighted arm 19, the upper end of the arm2O coming sharply into contact withv the lug 44 will subject thebell-crank comprising the arms and 43 to a slight clock-wise rotation,whereby the shorter arm 42 will be shifted upwardly through a sutlicientdistance to break the alinement of the links 3'? and 88. immediatelythereuponvthe weight of the material resting upon the door of theauxiliary receiver will swing said door open, simultaneously shifting.the correlated parts 86, 37 and 38 to the positions indicated in dashlines in Fig. l.

Between the upper pair of arms 80, there is rigidly mounted a chute 48,which chute is furthermore engaged between a pair of horizontal beams 50rigidly connecting the arms 30, and respectively contiguous with thefront and bach wall-s of the chute. The bottoni of the chute 48 is ofsemi-cylindrical form, and is spaced a short distance above the frontedge of the auxiliary receiver. The bottom of the chute 48 is formedwith a discharge orifice elongated between the side walls of the chute,said orifice being formed in the middle or lowermost portion of thebottoni of the chute, and being disposed directly above the front wallof the auxiliary receiver, as is most clearly illustrated in Fig. 4.

In the bottom portion of said chute, a rotary agitator 5l is mountedfast upon a shaft 52 disposed at the center line of curvature of thebottom of the chute and journaled in the side walls of the same. Aplurality of ribs 53 projecting` rigidly from the peripheral face of theagitator, and extending from end to end of the same serve to positivelyimpart to the material contiguous to the agitator the rotary movement ofthe same. Upon one end of the shaft 5l,

if exterior to the chute 48, a drive pulley 54 is mounted Upon the otherextremity of said shaft. there is mounted fast a crank wheel 55. alsoexterior to the chute, and from said cranlr wheel, a Ditman 56 extendsforwardly and is pivotally connected with the upper end of an arm 57mounted fast upon a shaft 58 parallel to the shaft 5l. rllhe shaft 58passes centrally through a substantially ,cylindrical casing 59, theendwallsof which form bearings for said shaft.

liil'itliin said casing, there is mounted upon the shaft 58 an ordinaryspiralconveyer 60, which when subjected to rotation will vconvey suchmaterial as may have entered the ceding 59 to one extremity thereof fromwhich extremity an auxiliary chute 6l is extended downwardly just infront of the auxiliary receiver, projecting at its lower end slightlyinto the main receiver. A limited amount of the material in the mainchute 48 is adapted to enter the vcasing 5,9 througha rectangularorifice G2 formed in the partition between said chute and casing (seeFig. 2). lUpon the shaft 58 Aadjacent to the arm 5'?, there is mountedfast a sprocket wheel G3 the teeth of which are engaged by aspring-pressed pawl G4 mounted upon the upper end portion of sa'id arm,The crank wheel 55, pitman 56, arm 57, and pawl 64, engaging the ratchetwheel G8 constitute a mechanism for normally communicating to theconveyor G0 a step-by-step rotation by which a small amount of material,known in the art as a dribble is normally fed into the auxiliary chute61.

ri. mechanism for periodically interrupting the. communication ofstep-by-step rotation to the said conveyer will now be described.Adjacent to the ratchet wheel 68, is loosely mounted upon the shaft 58an arm 65, projecting upwardly at a rearward inclination, and carryingupon its free end an arcuate guard plate 66 covering a portion of thetoothed face of the ratchet wheel. Normally this plate will be disposedslightly to the rear of the pawl 64, offering no impediment to theengagement of said pawl with the ratchet wheel. From the pivotedextremity of the arm 65. a pin 67 projects rigidly in a forward anddownward direction. and an elongated swinging link 68 establishesconnection between the outer end of the pin 67 and the front end of thebar 7 which is at the same side of the scales as said pin` The downwardmovement which the receiver undergoes when its load has reached apredetermined weight serves to communicate through the rod 68 a slightangular displacement to the guard plate o6 such that said guard platewillinterpose itself between the pawl S4 and the ratchet wheel 63 iustbefore the main receiver reaches its low rmost position, therebydiscontinuing rotation of the conveyer during the time thatl the mainreceiver is discharging.

iiitl'l the discharge apertureof the chute 48., there is correlated anadjustable spout 69, which entends from end to end of the chute 48beneath the same, and is swung from the shaft 52 by a pair of arms 70disposed respectively adjacent to the end walls of the chute 48 andhaving a rigid connection with said spout. The spout 69 is adapted to beadjusted between two limiting positions, in one of which said spoutconducts the material escaping from the chute 48 into the auxiliaryreceiver 32, as illustrated in full lines in Fig. 1, while in the otherlimiting position, said chute will discharge the material into theauxiliary chute 61, as indicated in dash lines in Fig. 1. rThe latterposition is the one which said spout will ordinarily occupy, the otherposition being assumed only for comparatively short intervals of time.Adjacent to the point of juncture of theV rod 68 with one of the bars 7,there is pivotally connected to the same bar, an elongated swinging link71, which is extended upwardly and has pivotal connection at its upperend with a bracket 72 mounted fast upon one of the arms 70. The verticaldisplacement of the receiver acts through the rod 71 to control themovement of the spout 69 between its two limiting positions.

A complete explanation will now be given as to the operation of myimproved weighing scales. From a suitable bin, (not shown) a continuousstream of bulk material is permitted to escape into the chute 48, therate of How of the material being proportioned so that the material willbe discharged from said chute as rapidly as it enters the same. rEheconstantly revolving agitator 53 will overcome any tendency of thematerial to become packed in the bottom of the chute 4S, forcing thematerial to discharge from the chute through the aperture 62 and spoutG9. When the machinery is started, the re- I ceiver 5 being empty willbe maintained in its uppermost position by the counterbalancing weights14 and 15, and since the bars 7 will also be in their uppermotpositions, the spout 69 will occupy the positions indicated in dashlines in Fig. 1, conducting material from the chute 48 into theauxiliary chute 61. Hence the main receiver 5 will gradually be filledwith the material entering said receiver from the auxiliary chute. Sincewhen the bars 7 are in their uppermost or horizontal positions, theguard plate 66 does not interfere with the step-by-step actuation of theratchet wheel G3, the spiral conveyer 60 will revolve and while the mainreceiver is filling, will maintain a small flow or dribble of materialinto the auxiliary chute from the conveyer casing 59.

lt is apparent that a step-by-step rotation of the conveyer will bemaintained as long as the pawl (5f-i is permitted to engage the teeth ofthe sprocket wheel, since the arm 57 carrying the pawl is subjected toconstant oscillation by its connection with the crank wheel 55.

When there has aumulated in the main receiver a certainpredeterminedweight of material, the counterbalancing effect of theweights let and 15 will be overcome, and the receiver and the arms 7will shift to their lowermost positions. While the main receiver and thebars 7 are shifting from their uppermost limiting positions to thepositions illustrated in full lines in the drawings, the adjustablespout 69 will be shifted from the position illustrated in dash lines inFig. l to that illustrated in full lines in the same figure. n otherwords, while the receiver and bars 7 kare undergoing the specifieddisplacement, the flow of material into the auxiliary chute 61 will becut off, and will be transferred to the auxiliary receiver 3K2. Sincethe main flow of material into the main receiver has been cut off by thetime said receiver reaches the position illustrated in full lines in thedrawings, the completion of the downward movement of said receiver mustbe actuated by the weight of material iiowing into the receiver as adribble, this flow being maintained by the step-by-step rotation of theconveyer G0. It is imperative therefore that the conveyer be permittedto continue its operation after the receiver has passed through thefirst portion of its downward motion. Such angular movement therefore asthe guard plate 66 will undergo while the receiver is descending fromits uppermost limiting position to that shown in full lines in thedrawings will not bring said guard plate to a position such as willimpede the engagement of the ratchet wheel 63 by the pawl 6%. As thedribble flow carries the receiver through the final stage of itsdownward displacement. the guard plate G6 will in passing through thefinal stage of its forward angular displacement raise the pawl 6i out ofcontact with the ratchet wheel 63, and thus out 0H the dribble flow (bystopping the spiral conveyer) just before the door of the main receiveris thrown open through the unlocking of the linkage correlated with saiddoor by the parts 27 and 28. When the door of the main receiver is open,and the parts 20, 21 and have assumed the position shown in dash linesin the Fig. 1, the elongated bellcrank arm 43 is prevented from swingingforward to a vertical position bv the stop bracket 47a. T he weight ofmaterial resting upon the door of the main receiver, will throw saiddoor immediately wide open when the correlated locking mechanism isreleased, and the contents of the receiver will therefore dischargeimmediately and completely, the operation of discharging being performedwith sufficient speed to be completed before the receiver can fullyundergo its return to its normal uppermost position.

During the brief time interval necessary for the receiver to completeits downward motion and to discharge its contents, the auxiliaryreceiver will be taking the ilow of material through the spout o9 fromthe chute 4S. As the door or' the main receiver resumes its closedposition, the upperl end of one oi' the arms 20 will strike sharplyagainst the lower end of the bell-crank member' 4:3, and will thussubject the bellcrank to an angular displacement such that the short arme?, or' said bell-crank will unlock the linkage holding the door ot' theauxiliary receiver closed. rlfhe material in the auxiliary receiver willtherefore immediately force said door open and the said receiver willdischarge its contents into the main receiver. The door of the auxiliaryreceiver will then be closed by the correlated weighted arm and inclosing will be automatically locked by the correlated linkage. Thereturn upward motion of the receiver will irst subject the guard plate6G to a rearward displacement permitting the pawl 6% to engage theratchet wheel G3, and will subsequently shift the adjustable spout G9 soas to divert the flow of material from the auxiliary receiver 32 to theauxiliary chute 6l. lt is to be observed that the bellcrank comprisingthe arms 42 and 43 does not.normally occupy a position such as willinterfere with the locking etl'lect of the linkage correlated with thedoor of the auxiliary receiver. The displacement ot said bellcrankwhereby it acts to unlock the said linkage is only momentary, and thebellcrank returns due to its own weight to the position illustrated inthe drawings in which the auxiliary receiver door linkage is permittedto remain locked. Each time that the main receiver has accumulated thedesired and predetermined amount of material the above described seriesof automatic operations will be repeated, so that at substantiallyconstant time intervals there will be discharged from my scales certainknown quantities of the material being weighed.

rlhe invention is presented as including all such changes andmodifications as properly come within the scope of the following claims.

What l claim is:

l. In a device of the character described, a counterbalancecl mainreceiver, displaceable downwardly to a limited extent, and provided witha door at its bottom, of a mechanism normally locking the receiver doorin its closed position, means automatically tripping said mechanism asthe receiver reaches its lowermost position, a fixed auxiliary receiverlocated above the displaeeable receiverI and provided with a door at itsbottom adapted to discharge into the main receiver, a mechanism normallylocking said last-mentioned door in its closed position, a chutenormally discharging bulk material into the main receiver, mechanismcutting off the main flow of material into the main receiver as thelatter moves down, diverting said flow into the auxiliary receiverduring the discharge ot' the main receiver and renewing the iiow intothe main receiver as the latter moves up, and means tripping the lockingmechanism of the auxiliary receiver door during the upward motion of themain receiver.

2. In a device ot the character described, a counterbalanced mainreceiver, displaceable downwardly to a limited extent, and provided witha door at its bottom, of a 'mechanism normally locking the receiver doorin its closed position, means automatically tripping said mechanism asthe receiver reaches its lowermost position, a fixed auxiliary receiverlocated above the displaceable receiver and provided with a door at itsbottom adapted to discharge into the main receiver, a mechanism normallylocking said last mentioned door in its closed position, a chutenormally discharging bulk material into the main receiver, mechanismactuated by said receiver cutting off the main flow of material into thereceiver as the latter moves down, diverting said iiow into theauxiliary receiver during the discharge of the main receiver andrenewing the flow into the primary receiver as the latter moves up, andmeans actuated by the main receiver during its upward motion trippingthe locking mechanism of the auxiliary receiver door during the upwardmotion of the main receiver.

3. In a device of the character described, the combination with acounterbalanced receiver, displaceable vertically to a limited extent,and provided with a door at its bottom, of a mechanism normally lockingthe ieceiver door in its closed position, means automatically trippingsaid mechanism as the receiver reaches its lowermost position, a chutenormally discharging bulk material into the receiver, a mechanismactuated by the receiver, cutting ott the main flow of material into thereceiver as the latter moves down and renewing the 'How as the receivermoves up, a casing communicating with said chute and receiving materialfrom the same, a conveyer mounted in said casing, discharging a smalliow of material into the receiver when in operation, a pawl and ratchetmechanism through which a step-by-step rotation is communicated to theconveyer, and a mechanism actuated by the receiver disengaging the pawland ratchet wheel during the linal stage of downward motion of thereceiver, subsequent to the cutting ofi" of the main tlow, and renewingthe engagement of the pawl with the ratchet wheel during the primarystage of upward motion of the receiver.

4t. In a device of the character described, the combination with a maincounterbalanced receiver, displaceable vertically to a limited extent,and provided with a door at its bottom, of a mechanism normally lockingthe receiver door in its closed position, means automatically trippingsaid mechanism as the receiver reaches its lowermost position, a chutenormally disclfiargingy all bulk material into saidreceiver, a ixedauxiliary receiver, provided with a door at its bottom adapted todischarge the contents of the auxiliary receiver into the main receiver,a periodically acting mechanism diverting the main discharge of materialfrom the main receiver to the auxiliary receiver during downwarddisplacement or the main receiver, andV producing the reverse eifectduring upward displacementy of the main receiver, a mechanism normallymaintaining a small iiow of material into the main receiver through themain supply chute additional to the main flow, and a mechanism cuttingoil or renewing the small flow of material according as the receiver iscompleting the final stage of itsdownivard motionl or undergoing theprimary stage of its upward motion.

5. In a device of the character described, the combination with avcounterbalanced main receiver, displaceable vertically to a limitedextent, and provided with adoor at its bottom, of a mechanism normallylockingfthe receiver door in its closed position, meansy automaticallytripping said mechanism as the receiver reaches its lowermost position,a chute normally discharging bulk material into the main receiver, anauxiliary receiver provided at its bottom with a door adapted todischarge the contents of said receiver into the main receiver, anadjustable spout mounted beneath said chute, and de- 'lecting materialfrom the chute into the main receiver or auxiliary receiver accordingas. it isin one or the other of its limiting positions, a mechanismactuated by the re ceiver shifting saidadjustable spout to dischargeintoy the auxiliary receiver as the main receiver moves down, andassisting the spout to discharge into the main receiver as the lattermoves up, means normally locking the door of the auxiliary receiver andmea-ns actuated by the main receiver during its upward motion trippingthe locking mechanism of the auxiliaryreceiver door.

6. Inv a device of the character described, the combination with acounterbalanced main receiver, displaceable vertically to a limitedextent, and provided at its bottom with a door, of a mechanism normallyloclring said door in its closed position, means automatically trippingsaid mechanism as the receiver reaches` its lowermost position, a chutenormally discharging bulk material into the main receiver, an auxiliaryreceiver mounted above the vmain receiver and l provided with a door atits bottom adapted to discharge the contents of said receiver into-themain receiver, a mechanism actuated by the main receiver diverting themain iow of material from said receiver into the auxiliary receiver asthe main receiver moves downwardly and diverting thelow of material backto the main receiver as the latter movesV upwardly, a casing mounted adjacent to said chute, normally receiving a slight iow of material fromthechute, a rotary conveyer mounted in said casing, a mechanism normallysubjecting the conveyer to, a step-by-step rotation, and a mechanismautomatically stopping the conveyer as the mainreceiver approaches itslowermost position, and starting said conveyer assaid receiver commencesits upward motion.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ANDREW M. VILLAMS.

Witnesses:

R.. E. C. BKUCKNER, C, A. ELLIS.

Copies of this patent may ce obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C,

